Annealing box



April 8, 1930.

A. M. cAPPER ANNEALING Box Filed march 9, 1928 Mann-Hung F.IGJ.

Patented Apr. 8, 1930 UNITED s'rzvrns PATENT OFI-lcs ARTHUR H. cAPPnn, OP PITTSBURGH, PENNSYLVANIA, AssIGNOn TO nUoUEsNn STEEL POUNDRY COMPANY, OP PITTSBURGH, PnNNsYLvANIA, A CORPORATION OF PENNSYLVANIA Application led March 9,

In the use of annealing boxes, the boxes have a tendency for the side walls to warp outwardly, while the i longitudinal .bottom edges tend to curve inwardly. Heretofore 5 in the manufacture of cast annealing boxes it has ybeen the practice to form various types of corrugationsv in the walls of the box to resist warping, but such corrugations have always been terminated in the side walls of the box above the lowermost edges thereof. It has heretofore been considered necessary to provide a substantially straight edge along the bottom of the sides and end walls of the box, these straight edges usually having a bead or foot portion therealong.

According to the present invention, I propose to Aprovide an annealing box wherein the ribbing or corru ations, or other reinforcing devices extend c ear to the bottom of the vbox rather than terminating in the walls ofthe box above the bottom.

vMy invention may be understood by reference to the accompanying. drawings which show several embodiments of my invention above the lowermost edge so that it could not as applied to annealing boxes and in which- Figure l is a side view partly in section and partly in elevation of an annealing box embodying my invention of the type wherein the side walls are'formed of a plurality of channel-like sections which are alternately reversed;

Figure 2 is a transverse vertical section in the plane of line II-II of Figure 1;

Figure 3 is a side view of a portion of an walls of the box are provided with doublev corrugations for bracmg them; y Figure 4 is a view 'similar to Figure 3 showmg my invention as applied to a box 40 having single corrugations; and

Fi re 5 is a transverse vertical section in I v the p ane of line V-V of Figure 4.

In the drawings, 2 designates an annealing box having side walls 3. 4The side walls 3 are made up of a series of inwardly turned channels 4 between which are outwardly turned channels 5; vIn the outwardly turned channels is a bracing web structure, this structure preferably comprising a vertlcally extending web 6, and transverse webs 7. The

`down from the cross web 11 are a annealingbox of Aanother type wherein the I have shown the same idea applied to a' box ANNEALING Box 192s. serial No. aeaaos. l

webs 6 extend down to a transverse web 8, and projecting from the transverse web 8 short webs 9. structure is shown at 10 in the inwardly turned channels inside the box. Extending lurality of webs 1 2 similar to the webs 9 but reverse with respect thereto. f The end walls 13 of the annealing box may also have one o'r more channels 14' therein with. bracing similar 'to-v that described.

By inspection of Figures 1 and 2 it will be seenl that the channels 4and 5 extend to theV extreme lowermost edge of the box, both alongthe sidewalls and at the end walls. Likewise the bracing webs. 9 and 12 extend clear down to the very edge of the box.

The advantage of this arrangement resides in the fact that the bracing webs or corrugations extending clear' to the lowermost edges of the box resist the tendency which the edges of the box have to curl inwardly. Heretofore all such bracing has terminated effectively resist thisvtendency of the edges to curl inwardl By forming a plurality of braces at 9 an 12 in the channels near thelower edge of the box, further reinforce'- ment against this tendenc of the edges to curl inwardly is provide This arrangement is more eifective than Where a single vertical web extending throughout the height of the channel is provided.

In the arrangement shown in Figure 3, I

of a dii'erent construction. In this fi ure,

the box 15 has its side walls 16, and i de-Q ward curling. I have shown a-di erent ari rangement of the webbing 20 for this form of box, but Obviously an suitable arrangement of webbing may be su stituted.

In the arrangement shown in Figures 4 and 5, the invention is shown as being applied to t e simplest form of braced box, the box 21 h ving single spaced apart corrugations 22 in the side and end walls. These corrugations extend clear to the very edges of the side and end walls to resist the inward curlin of the walls.

ile I have illustrated the invention as being applied to different specific forms of boxes, it will be understood that the invention is agplicable to Various forms of braced boxes. y carryin the bracing clear down to the edges of the ox, the walls of the box are not only braced against bowing outward.-` ly, but the edges are braced against curling inwardly. The construction also simplifies the casting of the box.

I claim: An annealing box having alternate reverse- 1y arranged channel portions formed in its walls and having a bracing structure betweenv some ofthe alternate channels, said bracing structure including a vertical web terminating in a transverse web spaced above the bottom of the box, and a plurality of parallel webs out of alinement with said vertical web extending from said transverse web tothe bottom of the box.-

In testimony' whereof I have hereunto set my hand.

ARTHUR M. CAPPER. 

